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AW00136902000
11.2 Gain
By default, the gain auto function is enabled. Manual adjustment of the Gain
parameter will not work.
Set the GainAuto parameter to Off before making any manual adjustments.
For more information about the gain auto function, see Section 11.11.3 on
page
116.
The camera's Gain feature is an analog
feature allowing you to adjust gain. As shown
in
Figure
37, increasing the gain increases
the slope of the response curve for the
camera. This results in a higher gray value
output from the camera for a given amount of
output from the imaging sensor. Decreasing
the gain decreases the slope of the response
curve and results in a lower gray value for a
given amount of sensor output.
Increasing the gain is useful when at your
brightest exposure, a gray value lower than
255 (in modes that output 8 bits per pixel) or
4095 (in modes that output 12 bits per pixels)
is reached. For example, if you found that at
your brightest exposure the gray values
output by the camera were no higher than
127 (in an 8-bit mode), you could increase the
gain to 6 dB (an amplification factor of 2) and thus reach gray values of 254.
This section describes how gain can be adjusted manually by setting the value of the Gain
parameter. The camera also has a gain auto function that can automatically adjust the gain.
The camera's gain is determined by the value of the Gain parameter. The parameter is adjusted in
dB. The maximum regular value varies by camera model (see
Camera Model
daA1280-54bm/bc
daA1600-60bm/bc
daA2500-14bm/bc
Table 32: Maximum Allowed Gain Settings (in dB)
Basler dart BCON
Max Allowed
Setting (in dB)
18
24
Gray values
(12-bit)
(8-bit)
Sensor output signal (%)
Fig. 37: Gain in dB
Table
32).
Features
83
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